The pain on the outer side of the upper arm of the right arm may be caused by muscle strain, cervical spondylosis, frozen shoulder, etc. It is recommended to find out the cause of the disease, and then carry out physical therapy, functional exercise, medication, surgery, and so on. 1. Muscle strain: excessive arm exercise can lead to muscle fatigue, muscle fiber damage caused by pain, infrared laser therapy, magnetic therapy and other treatments to promote local blood circulation, speed up the body’s metabolic rate and relieve pain. Non-steroidal anti-inflammatory drugs such as ibuprofen can also be used to relieve pain. After the pain is slightly relieved, flexion and extension of the arm can be performed with the help of tools under the guidance of the doctor to exercise the muscle strength of the arm. 2. Cervical spondylosis: degenerative changes in the cervical spine will compress the nerves around the cervical spine, causing pain in the right upper arm. In order to reduce pain, physical therapy such as traction and hot compresses can be performed to promote local blood circulation and relieve pain. Functional exercises for the neck can also be performed to enhance the local muscle strength of the cervical spine and reduce the compression of the cervical spine on the nerves, thus relieving the symptoms. Microwave, magnetic therapy, interferential electrical stimulation and other physical therapy can also be used to relieve cervical pain. 3. Frozen shoulder: The aseptic inflammation around the shoulder can cause pain. At this time, under the assessment and guidance of the rehabilitation therapist, you can carry out pain-free range of arm flexion, extension, abduction and other exercises to increase muscle stability, which in turn relieves pain on the outside of the upper arm. Non-steroidal anti-inflammatory drugs such as ibuprofen can also be taken under the guidance of a medical professional to alleviate pain symptoms. It is recommended that patients go to the orthopedic department of the hospital in order to clarify the cause of the disease before treatment, do not blindly use drugs.